Improvement in machines for forming wrench-bar heads



2 Sheets--Sheet I" A; G. COES.

Improvement in Machines for Forming Wrench Bar-Heads.

No. 128,118, Patented June18, 1872.

2 Sheets--Sheet2.

v A. GJCOES Improvement in Machines for Forming Wrench Bar-Heads;N0.128,118. Patentedlune18,1872.

TIM lxl chlesses Tlnrrnn STATES PATENT OFFICE.

AURY G. GOES, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR FORMING WRENCH-BAR HEADS.

Specification forming part of Letters Patent No. 128,118, dated June 18,1872.

To all whom it may concern:

Be it known that I, AURY G. Cons, of the city and county of Worcesterand Common- Wealth of Massachusetts, have invented certain new anduseful Improvements in Machines for forming Wrench-Bar Heads; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanying drawingwhich forms a part of this specification, and in which- Figure 1represents an end view of my improved machine for forming wrench-barheads. Fig. 2 represents a front view of the same. Fig. 3 represents atransverse section of the forming-dies at line X, Fig. 1, with thewrenchbar in the dies. Fig. 4 represents the form of the wrench-bar headbefore passing the dies; and Fig. 5 represents the form of the headaffor passing through the machine.

The nature of my invention consists in certain improvements in mechanismfor forming the heads of wrench-bars, as hereinafter described.

In the drawing, the part marked A represents the frame, which supportstwo horizontal shafts having die-supporting heads B and O at one end,while their opposite ends .are connected to each other by a pair ofspur-gears, D D, of equal size, so that both of the shafts will revolvewith a uniform motion. A suitable driving-gear may be meshed with one ofthe gears D D, or one of the shafts may be extended and a pulleyarranged thereon to receive a driving-belt or any other suitable mechanism may be used for imparting motion to the shafts and die-supportin gheads B O. The lower head B is fitted with clamping-dies, composed ofthe parts E E, which are formed of the proper shape to embrace the bar,and the sides and back of the wrench-head. One part, E, of theclamping-die is set into the head B in a stationary position, while theother part,

E, is held upon an adjustable slide, F, which can be moved in or out bya screw, Gr, arranged through the outer part of the head B, asillustrated in the drawing. The outer end of the screw G is providedwith a crank or hand wheel, by means of which it can be easily operatedfor clamping or loosening the die to of the arched portions a b extendsfrom front to rear, the line of the faces being straight laterally. Theseveral extremities c, d, and e of the die-faces are so constructed andadjusted that they will all three coincide, or nearly coincide, with asingle arc of motion around the axis of the upper shaft, while theposition of the wrench-bar is so adjusted in the clampingdie E E thatthe point of contact between the head and the die H will be as nearly aspossi-' ble in a plane centrally between the axis of the two shafts, thetwo tangential arcs of motion being equal to each other, so that the dieand head of the wrench bar will roll upon each other with a uniformmotion and thus prevent any wrinkling or undue straining of the metal asthe heads are drawn out and rolled into form.

The head of the wrench-bar having been par tiallyformed, as shown inFig. 4, is placed within the clamping-dies E E, the-bar extending downthrough an opening in the central part of the supporting-head B. Thelower edges of the head rest upon the shoulders 'm m of the dies, asindicated in Fig. 3. The dies are then closed by the screw G, so as tofirmly em brace the bar and sides of the head, thereby securing itrigidly in position. The machine is then put in motion, and the actionof the curved faces of the die H bends down the for ward part f of thehead and draws or rolls it out into the form shown in Fig. 5. After ithas passed under the die it is removed by loosening the screw G. Therough end is trimmed off at the dotted line h h, Fig. 5, by a subsequentprocess. The die H can be adjusted by means of the screws I, so as torollv the front ends of the heads of greater or less thickness, or tovary the position of the angle 70 at the upper part of the head,asdesired.

The dies can be removed from the support ing-heads and replaced by diesof different porting-heads B C, of the clamping-die E E sizes forforming the heads of difierent-sized and forming-die H, substantially asand for wrench-bars. the purpose stated.

Having described my improved machine for AURY G. GOES. formingwrench-bar heads, what I claim therein as new and of my invention, anddesire to Witnesses: secure by Letters Patent, is- THOS. H. DODGE,

The combination, with the revolving sup- CHAS. H. BURLEIGH.

